MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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You are running a left-tailed 2-sample z-test at the 0.05 level of significance and you find a test statistic of z=-1.87. Shoudl you reject or not reject the null?
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- You are conducting a study to see if the probability of catching the flu this year is significantly more than 0.2. You use a significance level of a = 0.005. Họ:p = 0.2 H1:p > 0.2 You obtain a sample of size n = 542 in which there are 126 successes. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is.. less than (or equal to) a greater than a This test statistic leads to a decision to... reject the null accept the null fail to reject the null As such, the final conclusion is that. There is sufficient evidence to warrant rejection of the claim that the probability of catching the flu this year is more than 0.2. There is not sufficient evidence to warrant rejection of the claim that the probability of catching the flu this year is more than 0.2. The sample data support the claim that the probability of catching the flu…arrow_forwardI need in an hour pls help Thankyou.arrow_forwardConsumer Reports did a survey of 1100 adults and found that 565 were unhappy that their food did not look like the picture in the menu. Use a 0.05 significance level to test the claim that the majority of adults are annoyed by food that does not look like the picture in the menu. What is the test statistic for this problem? TTTArial 3 (12pt) v T- Earrow_forward
- Can you think of any flaws in the One-Sample Z-Test for Mean?arrow_forwardA random sample of n1 = 299 voters registered in the state of California showed that 146 voted in the last general election. A random sample of n2 = 211 registered voters in the state of Colorado showed that 120 voted in the most recent general election. Do these data indicate that the population proportion of voter turnout in Colorado is higher than that in California? Use a 5% level of significance. I need help with the wrong ones. level of Significance: .05 | H0: p1 = p2; H1: p1 < p2 |arrow_forwardImagine you're a researcher and you need to perform a one-sided test of an alternate hypothesis. You decide to conduct a significance test at the .05 level. Which of the following of ranges of z-scores would make the test statistic significant at .05 (one -tail) but not at .01 . A. z < 1.96 B. 1.645 < z < 1.70 C. z > 1.60 D. - 1.96 < z < 1.96 E 1.645 < z < 2.33arrow_forward
- When do you use a z-test versus a t-test.arrow_forwardPlease assist with this question. I am lostarrow_forwardYou are conducting a study to determine if there is a significant difference between typical salaries of surgeons and stock brokers (in thousands of dollars). Calculate the test-statistic, t with the following sample data.n1=20 x¯1=163, s1=4n2=50, x¯2=162, s2=9 Round to 2 decimal placesarrow_forward
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